2 papers
astro-ph2000
Microlensing of multiply-imaged compact radio sources: Evidence for compact halo objects in the disk galaxy of B1600+434
L. V. E. Koopmans, A. G. de Bruyn
We present the first unambiguous case of external variability of a radio gravitational lens, CLASS B1600+434. The VLA 8.5-GHz difference light curve of the lensed images, taking th…
astro-ph2000
Micro & strong lensing with the Square Kilometer Array: The mass--function of compact objects in high--redshift galaxies
L. V. E. Koopmans, A. G. de Bruyn
We present the results from recent VLA 8.5-GHz and WSRT 1.4 and 4.9-GHz monitoring campaigns of the CLASS gravitational lens B1600+434 and show how the observed variations argue st…